Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Power is the ability to supply a device with energy. This question covers how to power the Pi, ways to do it, and the safe ranges of power.

0
votes
2answers
22 views

Restore UART pins 8 & 10 after GPIO.cleanup() without reboot

A Raspberry Pi 3B+ is talking to an STM32 chip via UART over pins 8 (TXD) & 10 (RXD). When I take control of those pins using GPIO.setup(8, GPIO.OUTPUT); GPIO.output(8, GPIO.LOW); and later ...
0
votes
0answers
10 views

Can I used a Raspberry Pi as a source of PAM8403 Power Audio Amplifier Module [on hold]

I have a project that use text-to-speech in Raspberry Pi, I buy a power amplifier in Shopee (online shop). The power amplifier module used PAM8403 and it need a 5V to use it. I want to connect it to ...
0
votes
1answer
21 views

Pi 3 and SainSmart 8 channel SSR - Not able to turn on all 8 relays

Pi 3 and SainSmart 8 channel SSR - Not able to turn on all 8 relays Environment: Raspberry Pi 3 OS: Raspian Language: Python3 and Java/Pi4J Control: SainSmart 8 channel Solid State Relay Issue: ...
0
votes
0answers
13 views

Power consumption benchmark of different Raspberry Pi models [duplicate]

Is there an official reference to get the power consumption numbers of different Raspberry Pi models? For example idle power, CPU peak power etc. I am looking to refer them in my research.
0
votes
1answer
27 views

Is splitting a wire off of a single 5V pin the same as using two 5V pins? [duplicate]

In other words, is two 5V pins plugged into two pins on another device (say a 16x2 LCD display) different or the same as using one 5V pin on the pi and splitting it to two pins on the LCD? For more ...
0
votes
0answers
19 views

2A Brushed motor driver [migrated]

I need to power 2 brushed dc motors with 2A each and 3 to 6V, one direction(no bidirectional or break). To the enable the rpi 3.3V pwm, and standard pins(breadboard), not those micro pins. I know the ...
0
votes
2answers
53 views

Is it safe to use this battery with the Raspberry Pi Zero?

I have two questions actually: 1) is it safe to use this battery and these wires with the raspberry pi zero? 2) if yes, where do i solder the highlighted (red square) ends to the zero board?
1
vote
0answers
53 views

Automatically restart Raspberry Pi on Shutdown

I'm currently using a Raspberry Pi 3 B+ at a remote location and use a VPN and SSH to access the device. If the power unexpectedly goes out at this remote location (or more commonly I stupidly ...
0
votes
2answers
36 views

Powering Raspberry Pi 3 + Official Display with anker switch power bank

There are a ton of questions posted similar to this but not quite this from what I had found, and I'm looking to understand this a bit more. I have a Raspberry Pi 3 as well as the official 7" display....
0
votes
0answers
23 views

RPi3 Touchscreen white fade reboot

I have an RPi3 with the 7in touchscreen attached. Sometimes when I boot up, it runs through the startup procedure, then at some point (it varies, has happened right near the beginning after the ...
0
votes
2answers
41 views

Can I power a raspberry pi and motor hat from the same source?

I have a raspberry pi 3 and an Adafruit motor hat. The motor hat is powered from a 24v wall plug adapter while the pi is powered from a 5v one. I'd like to save a wall outlet and cleanup the wires (...
0
votes
1answer
69 views

Raspberry Pi with 12V solenoid and 5V relay module

I want to connect and control a 12V door lock solenoid and am a bit unsure about the circuit. So far I've bought following components in: Raspberry Pi 3 Model B 4x18650 Battery Holder 4x18650 (3.7V)...
0
votes
1answer
58 views

Pi 2B, Under-voltage detected!, no lightening bolt, +5 is rock solid at 5.01VDC

This is a weird one - have had 2B in service for three years, but it crashed last week. Rebuilt with a new Pi 2B+, but saw undervolt errors on the rebuilt system that would have gone unnoticed, so ...
1
vote
1answer
129 views

How to power Raspberry Pi from a lab power supply via USB?

How can a Raspberry Pi be powered from a lab power supply via USB? I have a lab power supply that can easily output 5 V/4 A and I would like to use it to power a Raspberry Pi (version 3B and 3B+). ...
3
votes
1answer
87 views

How long to wait after shutdown to cut power

I am working a problem that seems to be fairly popular with the Raspberry Pi community. In essence, I am designing a circuit that will utilize a DS3231, a 555 timer, and a load switch to cut power ...
1
vote
1answer
27 views

Powering One Raspberry Pi Zero from Another

I'm trying to create a portable solution where two Pi Zeros are each running a camera module. I was thinking that I would use a single phone power bank. Is it advisable/possible to take 5 volts from ...
1
vote
2answers
112 views

Raspberry Pi 3 Model B (not B+) USB polyfuse location

Usual problem - USB power has gone. Where is the fuse located on the board? The reduced schematics on the RPi webpage does not show the USB at all.
0
votes
1answer
41 views

Prevent Pi Zero W from turning on after receiving power

My Pi Zero is powered by a small ATX PC power supply that is also powering a few other components: projector, audio amplifier. I'm using the gpio-shutdown device tree overlay to add a power button on ...
2
votes
2answers
217 views

Powering a sensor using an external power supply board

In my Raspberry Pi project, I need to measure a distance. To do that, I have an ultrasound sensor called "AJ-SR04M" (it is basically a waterproof HC-SR04 I believe). Characteristics of the AJ-SR04M: ...
2
votes
2answers
115 views

Do I need a resistor to wire my Pi Zero directly to a power source?

I want to connect my Pi Zero directly to a 5V 10amp power adapter (shown below) which in turn connects to a wall outlet. I know that with LEDs you can't just connect it directly to the power source ...
5
votes
1answer
168 views

Pi shuts down every day at 11:23 PM

I have a Pi Zero W running Raspbian Stretch Lite (June 2018). I'm using it to turn the crank on an automatic cat feeder. I've barely changed the base configuration: apt-get-installed git and samba, ...
2
votes
1answer
53 views

Everything is dead, but Pi 3B still boots

I left my Pi 3B (V1.2) alone, running a 64-bit build of Debian for a project. Everything was fine. When I returned, however, I found that everything was dead. Nothing was connected to it, by the way. ...
0
votes
2answers
47 views

Overcurrent protection

Are there any over-current protection measures on RPis? Either on GPIO or power supply pins. Are there differences between versions? Unfortunately two of my 3b+ boards are dead now because of brief ...
0
votes
1answer
69 views

Is it okay to power the Pi Touchscreen by plugging into the Pi?

I have the official raspberry Pi 7 inch touch screen, and I have mounted to it a Pi 2. Lately I have been using it and I have been plugging the power into the Pi itself. I however recently remember ...
1
vote
0answers
32 views

CM3 power-up - 3V3, 1V8 sequencing

We are developing a high volume product using a lot of CM3s and we're looking into some power-up sequencing issues. I found the following on one of the forums from 2014 (I assume it refers to the CM1)....
-2
votes
1answer
50 views

Energy consumption measurement using ACS current sensor [closed]

I want to build an energy consumption meter using my Raspberry Pi. I have done some research, and determined that the ACS712 current sensor could be interfaced with my RPi for this purpose. I do not ...
1
vote
1answer
104 views

Speaker for Pi Zero W

I'm looking for speaker without battery. I mean I need a speaker whose power can be supplied by raspberry pi zero w. I think I can use USB 2.0 simple speaker. I can cut its usb cable and connect its ...
0
votes
2answers
89 views

I have a Raspberry Pi 3B+, I'm running it from a 3.3A 24V LED Driver (Through a Buck Converter). I have a question about the PWR (Red) LED

I'm running a Raspberry Pi 3B+ on a 24V 3.3Amp LED Driver. I'm converting the 24V to 5.1V for the Pi using an MP1584EN DC-DC Buck Converter with a rated output current of 3Amp. I power the Pi though ...
1
vote
0answers
30 views

Is it possible to use 3.3v pin as usual GPIO for general purposes? [closed]

Need 6 pins one after another, but can't imagine where I can get them. Any ideas?
0
votes
1answer
37 views

Using Raspberry in Nanosatellite [closed]

I want to use raspberry pi in space projects like cubesats. I worry about effects of space radiation on raspberry.Is this possible to do?or i need to choose another board or something like that?
0
votes
2answers
31 views

Raspberry Pi Zero W not responding

I bought it about a year ago and a few days ago I plugged it into my Mac with a micro USB. I did make the mistake of plugging into the USB port initially but it did respond. For a while it worked i:e ...
0
votes
2answers
630 views

Raspberry Pi 3 RTC and Power ON button

I have a RTC DS3231 connected to my Raspberry Pi 3 B+. I connected it using this tutorial https://www.raspberrypi-spy.co.uk/2015/05/adding-a-ds3231-real-time-clock-to-the-raspberry-pi/ and everything ...
1
vote
1answer
101 views

3B+ won't boot after measuring at GPIOs - red LED on constantly

Today, I've experienced kernel panics every time I'd execute a certain python script. I was a little bit surprised, since I've executed more heavy scripts before, but doing my research, I found out, ...
0
votes
0answers
27 views

How to fix my Raspberry Pi 3 b1.2 - No red or green LED?

I went to start it up one day and it will not start up. There are no red or green LEDs. The power cord works but the Pi does not work. Please help me.
1
vote
1answer
68 views

Cooling fan causes shutdown

I'm using Raspberry Pi 3 with 5V/2.5A input. I'm going to do heavy work with Rasp (so need to cool CPU). Today I bought 5 V mini fan for my Raspberry and plugged to GPIO pins 4 and 6. While ...
0
votes
1answer
54 views

Automatically bring back the Pi while it shutdown

I've experienced several P3B+ automtically shutdown cases, by skiping the analysis of the root cause, I wonder what is the solution to automatically bring back the Pi again while it shutdown, I mean ...
0
votes
2answers
52 views

Uninterruptible battery power for a Raspberry Pi

Is it possible to power a Pi using battery power alone, such that you have two battery packs; one primary and one secondary? To ensure non stop running the Pi should run from the primary until the ...
0
votes
0answers
54 views

Internet Radio Device with batteries

I have a project that I will make a connection with the Internet and listen to a stream (in my case IP:port or .ogg, .m3u URL online radio station) then decode the music and transmit it to speakers ...
0
votes
1answer
74 views

Raspberry Pi Zero W - freezes after switching a relay connected to an AC motor [closed]

I'm working on a home IOT using Rpi to run script that controls opening/ closing window's shade ( switching its electric motor up or down ). 1) Code is very simple and working fine - switching gpio "...
1
vote
1answer
100 views

How to hack power bank with timer to power cycle Raspberry Pi

... without an Arduino (if possible). I am aware there are well-made solutions like the WittyPi, RTC-Arduino circuits, and some others with relay switches. If a power bank is directly connected to ...
0
votes
2answers
45 views

Turn off automatically every few days

A few week ago, I completed my first project: I have installed a raspberry pi zero W as a doorbell chime and it works relatively well. I’m not an expert on this kind of things, but I have just enough ...
0
votes
0answers
12 views

Power draw over various states of wifi/bt connectivity

Can someone measure power draw of a pi with integrated wireless over different states of connectivity such as scanning, connected, disconnected, in-use, disabled, etc, for Bluetooth LE and WIFI each? ...
0
votes
3answers
243 views

Convert GPIO to 5V Power output

Is there any way to use a normal GPIO pin as a 5V output pin? I am using a screen that prevent access to all power outputs, so I have only the normal GPIO pins and ground pins, not mentioning the ...
0
votes
2answers
152 views

Hardening a raspberry pi 3B

I have a Raspberry Pi 3B+, running NOOBS. I'm using it for home automation, and it's important to me that it never fail (or if lightning fries it, that it be trivial to swap in a new one. Downtime is ...
0
votes
1answer
195 views

Raspberry Pi 3B+ with a 2.5 hdd is the power always on?

Background I do not own a Raspberry Pi yet so I could not test this but I plan to get a 40 watt 5 port USB charging hub and have that power the Pi and a 2.5 hard drive (HDD); yes in this scenario 3 ...
0
votes
0answers
23 views

Is the USB power connection protected from reverse voltage?

Iam planning on makeing my own add-on board. It will have a 5V regulator, that will feed the GPIO-header 5V. I was just wondering if the USB port is reverse voltage protected? So it is still safe to ...
0
votes
0answers
68 views

Raspberry Pi Zero W and PowerBoost 500

I recently bought a PowerBoost 500 Basic, and I would like to know if it's enough to power a Raspberry Pi Zero W, running RetroPie or Recalbox, or if I need to switch on a PowerBoost 1000c. Also, can ...
0
votes
2answers
77 views

Powering a number of Pi from a single bench top power supply [closed]

I'm thinking of investigating the Bitscope Blade QUATTRO to host up to forty boards. Looking at the details each Blade can power the boards off a single supply, which need not be at 5V with up to 3A (...
1
vote
1answer
212 views

RPi stopped booting, only red LED, different rpi/sd/power supply do not work

Problem: I have a working sd card, a working rpi, and working power supply. When I then plug in an ethernet cable into the rpi and reconnect the power supply to a power bar (where I have 3 other rpi's ...
0
votes
1answer
118 views

How to get positive and negative voltage for my circuit from a Raspberry Pi?

I am trying to connect a circuit which needs a +5 V and -5 V input. How can I get both voltages from a Raspberry Pi?